Shut-off device for bag filling machines



Aug. 11, 1931.

F11-ed 01:1.29, 1929 s sheets-sheet 1 Y L F L n Menton f [IVY/[iam Fg] arson Aug. 11, 1931.

SHUT- w. R. PETERSON 1,818,094

OFF DEVICE FOR BAG FILLING MACHINES 3 'Sheets-Sheet 2 Filed oct. 2 9, 1929 Jwwntoz Aug. ll, 1931. w. R. PETERSON SHUT-OFF DEVICE FOR BAG F-ILLING MACHINES Fild oct. 25. 1929 3 Sheets-Sheet 5 Wiliam TiPeterson reuma Agg. 11, 1931 UNITED Q STATES imwila'lfoFl-flcl-:f

`W'ILIIAI B. PETERSON, OF OHIOAGO, ILLINOIS, ASB'IGNOB T0 ST. REGIS YAPEB GOI- Pm, Ol' m You N. Y., A. CORPORATION OF NEW YORK v snU'r-oirir DnvIcn non Baa muito ncnnms lThis invention relates to a cut-off device for a bag filling machine,`and more particularly to an automatic means for closing a cuto' gate in response to the weight of material in a bag; I An-object of the invention is to rovide cut-off means of the class .describe which w1ll operate with minimum of friction affectin the action of 'the weighing device, and w ich ma be adjusted to act promptly 10 when the weig ing device reacts to an exactly-redetermined extent.

ther objects ando details of the invention will aplpear as the descri tion proceeds. In t l part of this specification, Fig. 1 is a vertical section of one embodiment of the invention, with so much of a fllin and weighing inachine as is necessary to stliow how the invention is used therewith; Fig. 2 is a section sim- 20 ilar to Fig.,1, but showing the-parts in a dif- 'ferent position; Fig. 3 is a front elevation of a portion of the mechanism asV viewed from the right of Figs. 1 and 2; Fi 4 ,is a detail ot the gate-lifting lever; and ig. 5is a detail view substantially on the hne 5-5 of Fig. 3, showing the construction of a portion of the trip mechanism. v f

The filhng machine illustrated in connection with the cut-off comprises a casing` 'in a0 which there is an i111 ller 11 adapted to drive material out throu a discharge orifice 12. A-spout 13,`adap to enter the filling valve of a bag 14, is-mounted upon a frame ivoted at 16 on a scale beam 17. When ythe ag is empty, the scale beam supports frame 15 in suc a position that ut 13 registers with orifice 12, while the lle ba lowersthe beamv so that spout 13 is'lowere out of correct alinement with orifice 12, as shown in'Fig. 2.

In the construction shown, a link 18 ivoted on the frame at 19 holds the upper en of the frame in position to bring the spout into free sliding contact with casin 10.

'A gate 20 is provided or cuttingoif the ce flow of material through orifice 12. j. Gate 20 is constantly urged downward bya-srprin'g 21 connectin the ate to a bracket 22. he gate consists o a glate vhaving therethrough an orifice 23 whi may be brought into register 5o with orifice 12 when the gate is lifted.

e accompanying rawings forming a when the frameis lowered.

appunti Y11u11 october se, im. semi 11. was.

The upper end of the gate is provided with a connection 24 Aattached to a strap 25 suspended from an arm of a lever 26 fulcrumed at 27 on a stationary support. Lever 26is provided with an arcuate lug 28 which contacts strap and maintains the strap, where 1t is tangent to said arc, in line with gate 20.

An arm 29 is attached to lever 26 and is provided with a handle 30, by means of which the lever and gate may be lifted, against the tension of spring 21, to bring opening 23 in line with orifice 12. y

A plunger 31 is mounted in lever 26, and is normally urged downward by a spring 32, and'contacts a buffer late 33 to cushion the fall of the lever and t e 'ar at the end of the gate-closing movement o the parts.

The upper endl 34 of lever 26 co-acts with a latch 35 pivoted at 36. The lower end 37 of the latch is normally caught by a trip 38 so as to hold it in position to keep lever 26 raised while a bag is bein filled. 1

Tri 38 1s pivote at 39. A spring 40 is attache to a belt 41 adjustable 'm a lug 42 and normally raises trip 38 against a set screw 43 in lug 44. A screw 45 is adjustable in ar lug 46 onv frame 15, in position to depress trip 38 Lever 26, latch 35 and trip 38, as well as lugs 42 and 44, are mounted on a bracket 47 which is slidable vertically on a bracket 48 attached to stationary frame 49. A set screw 50 holds bracket 47 at the desired hei ht to properly register opening23 with ori ce 12 when the gate is raisedland to bringarcuate lu 28 in alignment Wit the gate.

he operation` of the stood from the foregoin descrigtvion, but may be briefly outlined as fo ows. ith the gate closed and the impeller in opal'ration, a bag is placed on filling spout 13. en handle 30 1s raised, thereby raising lever 26, strap 25 and gate 20, untilopening 23 registers with orifice 12. Thereafter material is driven from the casingby the impeller through 'the spout into the bag. j

Whenl lever 26 is oscillated in gate-opening direction, the point at which ,strap 25 is tangent to arc 28 remains in line with gate 20, so that there is no tendency to bend the gate and device may be undeil cause it to bind. When the ate is fully opened, 4end 34: is caught by late 35, the end 37 of which is held by trip 38.

When the weight of material in the bag causes the scale beam to swing and lower frame 15, screw 45 depresses trip 38, releases latch 35, and allows spring 21 to draw down gate until lever 26 is stopped by the con tact of plunger 31 with plate 33, at which time opening 23 is entirely below orifice 12, so that no more material is delivered.

Screw 43 is adjusted so that trip 38 rises just far enough to catch end 37 of latch 35. bpring 4.0 isadjusted so as to overcome the weight of trip 38 and holdit in raised position until positively depressed, and screw 45 isA adjusted so as to release latch 35 and allow the gate to close when ramel has been moved the exact amount that indicates the bag is filled as much as it should be when the gate is closed. j

It will be readily seen that latch 35 is such length that it requires but little resistance at its end 37 to' prevent the end 34 of lever 26 from swinging the latch about itepivot, since the lever contacts the latch so close to its pivot. For this reason there is little friction between on said frame for engaging the trigger to release the latch..

3 Ap aratus for filling bags comprising a filling evice having a discharge openlng through which material is discharged into a bag, a gate for said openin a spring conl stantly tending to close sai gate, a bracket adjustablein a direction at an angle to the path of the gate, a lever fulcrumed on said bracket and connected to said gate, an arm on said lever, a latch fulcrumed on the bracket and adapted to engage said arm and hold the lever in gate-opening position, a trigger pivoted on said bracket, a supporting frame for the bag mounted upon a weighing device, and means on said frame for engaging the trigger to -release the latch.

In testimony whereof I have hereunto signed'my name to this specification.

- WILLIAM R. PETERSON.

the latch and trip, and therefore this friction n does not materially aiect the operation of the weighingdevice when the trip is being depressed. At the same time, the various means for adjustment allows the tripping mechanism to be setso as to close the gate at the correct instant. g

While one embodiment of the invention has been described in some detail, it will be readily understood that changes may be made within the scope of the appended claims.

What is claimed is: f

1. Apparatus for illing bags comprising a lling deyice having a discharge opening through which material is discharged into'a bag, a gate for said opening, a spring constantly tending. to close said gate, a bracket adjustable with respect to said opening, a lever ulcrumed on said bracket and connected to lsaid gate, an arm on said lever, a latch -ulcrumed on the bracket and adapted to engage said arm and hold-the lever in gate-opening position, and means for releasing said latch when a bag is filled.

2. Apparatus'for filling bags comprising a fllling'de'vice-having a discharge opening through which material is discharged -into a bag, a gate for Vsaid opening, a spring constantly tending to close said gate, a bracket adjustable with respect to said opening, a

lever ulcrumed on s'aid bracket and connected to said gate, an arm on said lever, a latch fulcrumed nn the bracket and adapted to engage said arm andhold the lever in gateopening position,atrigger pivoted on said bracket, a supporting frame for the bag mounted upon a weighing device, and means lio 

